Name: Shu Lucifer

Other Names: The Sinful King, Tyrant King, Prince of Pride, The Forgiven.

Race: Devil (first super devil)

Age: 310 (sealed)

Affiliation: Underworld

Power: Crown of Sin (basically a magical version of Void Genome), Tyrant's Command (like Excalibur Ruler's power but overpowered), Water Magic, Dark Magic, Ice Magic.

Family: Lucifer (father), Leviathan (mother), Rizevim Livan Lucifer (younger half-brother), Vali Lucifer (Great grand nephew)

History:

The son of Lucifer and Leviathan and prince of the Underworld. Born shortly before the Great War, he is the first of the Super Devils before the birth of Rizevim Livan Lucifer, Sirzechs Gremory, and Ajuka Beelzebub. He is an absolute monster on the battlefield with his power to manipulate souls of both living and dead and his mastery over both Lucifer and Leviathan's power. But it all changed when he met the Archangel of Sacrifice and Azazel's daughter and they fell in love, turning the prince that was once the bane of Fallens and Angels into a compassionate person. Seeing this as a chance to one day create a better future, God sealed him together with Inori and Ayase to one day be awakened at the time the world needed them most. After his sealing, every records of him had somehow disappeared and only those as old as Zekram Bael remembers him.

Name: Yuzuriha Inori

Other Names: Archangel of Sacrifice, The Purest Daughter of Gaia, Innocent Angel, Last Archangel of God

Race: Angel (archangel)

Age: 35 (sealed)

Affiliation: Heaven

Power: Soul Insight, Crystal Light, Light Magic, Recovery Blessing (the base for Twilight Healing)

Family: Seraphs (brothers and sisters), God (father)

History:

The last Archangel created by God from the purest soul in the human world in that era. She was once a young girl travelling the world to see its wonder and she died a year after coming to the land of Yamato (japan) when she's trying to protect a friend. Since God found her there, she decided to name the new Archangel Inori as she did not have a name to call her own. She became the Archangel of Sacrifice when the Great War started. Her affinity with light magic is even higher than Michael due to how pure and selfless she was and she became a true powerhouse of the angels while crying tears of regret as she strike down her enemies. She met the Prince of the Underworld and Azazel's daughter there and they fell in love. She was sealed along with the two of them during the course of the war. Just like Shu, records of her had been erased and her existence had become a myth among the lower ranking angels. Only the Seraphs remember her.

Name: Shinomiya Ayase

Other Names: Fallen Princess, One Woman Army

Race: Fallen Angel

Age: 160 (sealed)

Affiliation: Grigori

Power: Parade of a Thousand Shikigami, Speed of Lightning, Light Magic, Senjutsu, Youjutsu, Touki

Family: Azazel (father), ms Shinomiya (mother)

History:

Born just a few years before the start of the Great War to Azazel and a Japanese hanyou woman, Ayase is the closest thing the Grigori has to a princess. She is energetic and hard-working and proud of her Fallen heritage which endears her to many of the cadre, even Kokabiel. She is the top fighter of Grigori, surpassing even her father due to her mastery over Senjutsu and Youjutsu along with her Fallen Angel abilities with her most notable ability being her ability to remotely control an army of shikigami while still being able to fight herself. She met Shu and Inori on the battlefield of the Great War and they are sealed together by God. Just like with Shu and Inori, records of Ayase had been erased and only the cadre knew of her existence.

Prologue

Shu Lucifer, son of Lucifer and Leviathan stood on a mountain peak as he watched the three Biblical factions battled against two towering beasts of immense power.

"DON'T GET IN THE WAY OF OUR BATTLE YOU PUNY ANGELS AND DEVILS!"

The red beast roared as he kill thousands of Fallens, Angels, and Devils with a sweep of his tail. No armor or shield could defend against the might of the red and white beast.

These beasts are the being known as Dragons, an embodiment of raw power and are frighteningly powerful that just the two of them dealt more damage to all three Biblical factions in one day than they could to each other in fifty years and the number of dead is still counting.

The brown-haired devil spread all twelve of his devil wings as he prepare to enter the battlefield.

But he was stopped by two familiar presence appearing behind him. He look back to see his two lovers hovering slightly above him with their respective wings spread.

To his right is a young girl who looks no older than her mid-teen possessing pink hair and slender figure that made her look fragile but Shu knew she is anything but. She posses twelve wings of purest white and a golden halo and her outfit is also all white. She is the Archangel of Sacrifice, Yuzuriha Inori.

To his left is a beautiful girl with a more developed figure than Inori who wears gray kimono and a black haori. She has twelve angel wings like Inori but hers is as dark as an endless void and she possess no halo. She is the daughter of Azazel, Shinomiya Ayase.

These three are very well known among the three factions as their respective aces.

And now they will combine their power to face the two Heavenly Dragons rampaging at the peak of their power. Even for them, this is a very tall order to accomplish.

With his two companions present, Shu felt a boost in his confidence. Even he will hesitate to face a Heavenly Dragon alone even if he has a chance of winning although small. Facing two of them? No way, he's not suicidal. He knows his limit. But with his two girls present, he felt like he could do anything.

But again before he could do anything, he was stopped.

"Wait, son of Lucifer."

He recognize that voice. How could he not? The owner of that voice is the only person in Heaven that is stronger than Inori.

Shu is now in the presence of God himself in the form of an impossibly beautiful man that he could not describe.

"Father, why are you here?"

Inori asked.

"I have a request to make of you three."

He told them. Shu, Inori, and Ayase pay close attention to what he's about to say next.

"Due to sealing Trihexa, I don't have the power enough to defeat the Two Heavenly Dragons. But I do not seek to defeat them, I wish to use them to complete the system I've planned to give to the humans."

Inori widened her eyes when God mentioned the system.

"Father, you don't mean that…"

"Yes my daughter. I plan to use the Heavenly Dragons as part of the Sacred Gear system."

"You're giving a weapon to those humans? Why?"

Shu asked.

"To protect them. I believe that I won't survive through this war and continue to watch over humans. I have spent too much strength on sealing Trihexa. Which leads me to my second request."

"A second request?"

"I would like to seal the three of you in suspended animation in another dimension."

"""!"""

The three of them are of course surprised at God's request. He's basically asking for the son and daughter of his enemies to voluntarily be sealed. Of course, having his old personality beaten out of him by Inori mainly, Shu could keep his calm and ask why.

"I believe that another conflict will rise in the future where the whole world will be threatened. For one, I'm worried that my Sacred Gear system might do more harm than good and for another, I'm worried about Trihexa being unsealed by someone. When that time comes, I believe that the three faction will come together again like what is happening right now. When such a time comes when you three are needed once more, then you will be unsealed."

The three of them thought for a while before looking at each other and nodding.

"Very well. But I don't want to spend my days just sleeping. At least allow our soul to roam to other worlds until the time our world needed us once more."

Shu replied.

"That is fine. I trust that this means that you three agree?"

"""Yes!"""

The three of them replied in synch.

"Very well. I thank you then."

What happens after that talk is a thing of legend. Records did not state clearly how the Heavenly Dragons were defeated. It was said that it was God himself who defeated the two dragons. Other said that it was the Satans. Other said that it was the Fallen cadres. Others said that it was all three.

Only Zekram Bael, the Seraphs, and the Fallen cadres knew.

It was the children of each faction straining their power to the limit that defeated the Heavenly Dragons.

And they were never seen again after that day.

And Done. I was remembering about Guilty Crown and then this idea suddenly came to mind. I don't know, it just seem appropriate. I still don't know what to do with King of Justice though. I just lost interest in Campione and well, it goes downhill from there. Besides, I'm more interested in DxD with all those sacred gears and non-complicated legends. How the hell should I know where Perseus' story came from?! How the hell do I trace Mordred's legend or the origin of Artemis?! And I'll be honest, I don't know well Alice's character and I don't know Voban or Doni as much as I would like.

So yeah, this is to make up to Shu for sending him to Campioneverse.

The events of Guilty Crown still happens but it will be in another world like a dream world for Shu and the two girls. As for power level, the trio are above the Super Devils since they did manage to defeat the Heavenly Dragons by themselves and managed to stay alive but individually, they're around a level or two below the Heavenly Dragons and a level below Shiva. So by the canon ranking system, they would take rank 4 till 6 or just share rank 4.

I still don't know how I come up with this idea.